The block-wheel device of the rotary kiln can be divided into the mechanical block wheel and the hydraulic block wheel. The mechanical block-wheel device can be achieved by manual adjusting kiln. The manual adjusting kiln is to adjust the inclination of the supporting wheel. You can coat oil and scatter the lime on the supporting wheel. The spiral can be used to make the rotary kiln float up and down. This kind of way to adjust the kiln has very low efficiency and it is time-consuming. The results are unsatisfactory. If you install hydraulic damper device on the foundation of the mechanical adjusting kiln, the hydraulic pressure produced by the damper can make the rotary kiln float up and down to reduce the mechanical attrition of the supporting wheel and extend the service life of the equipment. This kind of method can both save time and effort. The degree of automation is high, which is the main type of the damper device of the rotary kiln.
There are many kinds of structure types of the hydraulic damper device. However, they are similar. The hydraulic damper device is composed of the damper, guiding shaft, slide carriage, front and back bearings, the hydraulic cylinder of the damper and other components.  The damper is installed on the slide carriage which has two pilot sleeves. The two guiding shaft pass through the pilot sleeves on both sides of the slide carriage. The guiding shaft and the hydraulic cylinder are installed on the front and back supporting bearings. The slide carriage can do repeated movement along the guiding shaft.  The working principles are as the followings. The piston rod in the damper hydraulic cylinder pushes the damper. The damper contacts with the side slope of the rolling ring to push the rolling ring and drive the shift of the barrel of the rotary kiln. The piston rod move upward by the thrust of the hydraulic pressure. The piston rod move downward by the action of the component force of the gravity of the barrel.
The blocking-wheel hydraulic cylinder is a key component in the hydraulic damper device. The operating speed is low. The piston rod can withstand the eccentric load. The environmental radiation temperature is high and the pollution severe. The working condition is very poor. Too large radial force will make the contact surface not form the oil fim between the piston rod and the guide sleeve, which will reduce the service life of the rotary kiln in the stone production line and have great impact on the reliability of the operation of the rotary kiln. As a result, we should develop the block wheel with reasonable structure and long service life.
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